linux-kernel - [PATCH 3.16 124/212] IB/mlx5: Return error for unsupported signature type

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Date:   Thu, 01 Jun 2017 16:43:16 +0100
From:   Ben Hutchings <ben@...adent.org.uk>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:     akpm@...ux-foundation.org, "Leon Romanovsky" <leonro@...lanox.com>,
        "Leon Romanovsky" <leon@...nel.org>,
        "Sagi Grimberg" <sagi@...mberg.me>,
        "Dan Carpenter" <dan.carpenter@...cle.com>,
        "Doug Ledford" <dledford@...hat.com>
Subject: [PATCH 3.16 124/212] IB/mlx5: Return error for unsupported
 signature type

3.16.44-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Leon Romanovsky <leonro@...lanox.com>

commit 12bbf1ea7e3b35892dbb8636b978160bc9576b61 upstream.

In case of unsupported singature, we returned positive
value, while the better approach is to return -EINVAL.

In addition, in this change, the error print is enriched
to provide an actual supplied signature type.

Fixes: e6631814fb3a ("IB/mlx5: Support IB_WR_REG_SIG_MR")
Cc: Sagi Grimberg <sagi@...mberg.me>
Reported-by: Dan Carpenter <dan.carpenter@...cle.com>
Signed-off-by: Leon Romanovsky <leonro@...lanox.com>
Signed-off-by: Leon Romanovsky <leon@...nel.org>
Signed-off-by: Doug Ledford <dledford@...hat.com>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 drivers/infiniband/hw/mlx5/qp.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

--- a/drivers/infiniband/hw/mlx5/qp.c
+++ b/drivers/infiniband/hw/mlx5/qp.c
@@ -2336,8 +2336,9 @@ static int set_psv_wr(struct ib_sig_doma
 		break;
 
 	default:
-		pr_err("Bad signature type given.\n");
-		return 1;
+		pr_err("Bad signature type (%d) is given.\n",
+		       domain->sig_type);
+		return -EINVAL;
 	}
 
 	return 0;